react-native-device-time-format

On mobile devices users have the option to opt in/out, of the systems locale, in regards to 12/24 hour clock format:

This package exposes this device setting for iOS & Android.

Contributions

This package was heavily inspired by react-native-device-clock-format, which is "no longer actively maintained", and only supports iOS.

• React Native: 0.60+ autolinking support - fix by Tim Kuilman
• Android: SDK Build Tools version warning - fix by Tihomir Valkanov

Thank you 🙏

Getting started

Install with your preferred package manager:

yarn add react-native-device-time-format

or

npm install react-native-device-time-format --save &&

For iOS, install pod:

(cd ios/ && pod install)

For React Native < 0.60, run:

react-native link react-native-device-time-format

Should the automatic linking fail (in case of folder structure mismatch or various other reasons), please follow the manual installation guide.

Usage

Bellow is an example of fetching the hours & minutes string representation from a date, with the device time format (using moment for date/time formatting):

import { is24HourFormat } from 'react-native-device-time-format'
import moment from 'moment'

/**
 * @function getCurrentHourFormat
 * @param  {Date} date Date to format
 * @return {Promise<string>} formatted string HH:mm / h:mm A, depending on device setting
 */
const getCurrentHourFormat = async (date) => {
  const is24Hour = await is24HourFormat()
  return moment(date).format(is24Hour ? 'HH:mm' : 'h:mm A'))
}

All native modules runs asynchronous, I would suggest updating an internal state in your app when AppState changes to active.